A quantum-network register assembled with optical tweezers in an optical cavity

TL;DR

This paper demonstrates a scalable quantum register using optical tweezers and cavities to create entangled atom-photon pairs with high efficiency, advancing quantum network development.

Contribution

It introduces a method to assemble a 2D atomic array in an optical cavity with high-efficiency atom-photon entanglement, enabling scalable quantum networks.

Findings

Achieved multiplexed atom-photon entanglement with 90% efficiency.

Demonstrated deterministic assembly of a 2D atomic array in an optical cavity.

Provided a pathway for distributed quantum information processing.

Abstract

Quantum computation and quantum communication are expected to provide users with capabilities inaccessible by classical physics. However, scalability to larger systems with many qubits is challenging. One solution is to develop a quantum network consisting of small-scale quantum registers containing computation qubits that are reversibly interfaced to communication qubits. Here we report on a register that uses both optical tweezers and optical lattices to deterministically assemble a two-dimensional array of atoms in an optical cavity. Harnessing a single-atom addressing beam, we stimulate the emission of a photon from each atom and demonstrate multiplexed atom-photon entanglement with a generation-to-detection efficiency approaching 90$\%$. Combined with cavity-mediated quantum logic, our approach provides a possible route to distributed quantum information processing.